- 根目录:
- drivers
- media
- platform
- m2m-deinterlace.c
/*
* V4L2 deinterlacing support.
*
* Copyright (c) 2012 Vista Silicon S.L.
* Javier Martin <javier.martin@vista-silicon.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the
* License, or (at your option) any later version
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/dmaengine.h>
#include <linux/platform_device.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-dma-contig.h>
#define MEM2MEM_TEST_MODULE_NAME "mem2mem-deinterlace"
MODULE_DESCRIPTION("mem2mem device which supports deinterlacing using dmaengine");
MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.0.1");
static bool debug;
module_param(debug, bool, 0644);
/* Flags that indicate a format can be used for capture/output */
#define MEM2MEM_CAPTURE (1 << 0)
#define MEM2MEM_OUTPUT (1 << 1)
#define MEM2MEM_NAME "m2m-deinterlace"
#define dprintk(dev, fmt, arg...) \
v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg)
struct deinterlace_fmt {
char *name;
u32 fourcc;
/* Types the format can be used for */
u32 types;
};
static struct deinterlace_fmt formats[] = {
{
.name = "YUV 4:2:0 Planar",
.fourcc = V4L2_PIX_FMT_YUV420,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
},
{
.name = "YUYV 4:2:2",
.fourcc = V4L2_PIX_FMT_YUYV,
.types = MEM2MEM_CAPTURE | MEM2MEM_OUTPUT,
},
};
#define NUM_FORMATS ARRAY_SIZE(formats)
/* Per-queue, driver-specific private data */
struct deinterlace_q_data {
unsigned int width;
unsigned int height;
unsigned int sizeimage;
struct deinterlace_fmt *fmt;
enum v4l2_field field;
};
enum {
V4L2_M2M_SRC = 0,
V4L2_M2M_DST = 1,
};
enum {
YUV420_DMA_Y_ODD,
YUV420_DMA_Y_EVEN,
YUV420_DMA_U_ODD,
YUV420_DMA_U_EVEN,
YUV420_DMA_V_ODD,
YUV420_DMA_V_EVEN,
YUV420_DMA_Y_ODD_DOUBLING,
YUV420_DMA_U_ODD_DOUBLING,
YUV420_DMA_V_ODD_DOUBLING,
YUYV_DMA_ODD,
YUYV_DMA_EVEN,
YUYV_DMA_EVEN_DOUBLING,
};
/* Source and destination queue data */
static struct deinterlace_q_data q_data[2];
static struct deinterlace_q_data *get_q_data(enum v4l2_buf_type type)
{
switch (type) {
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
return &q_data[V4L2_M2M_SRC];
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
return &q_data[V4L2_M2M_DST];
default:
BUG();
}
return NULL;
}
static struct deinterlace_fmt *find_format(struct v4l2_format *f)
{
struct deinterlace_fmt *fmt;
unsigned int k;
for (k = 0; k < NUM_FORMATS; k++) {
fmt = &formats[k];
if ((fmt->types & f->type) &&
(fmt->fourcc == f->fmt.pix.pixelformat))
break;
}
if (k == NUM_FORMATS)
return NULL;
return &formats[k];
}
struct deinterlace_dev {
struct v4l2_device v4l2_dev;
struct video_device *vfd;
atomic_t busy;
struct mutex dev_mutex;
spinlock_t irqlock;
struct dma_chan *dma_chan;
struct v4l2_m2m_dev *m2m_dev;
struct vb2_alloc_ctx *alloc_ctx;
};
struct deinterlace_ctx {
struct deinterlace_dev *dev;
/* Abort requested by m2m */
int aborting;
enum v4l2_colorspace colorspace;
dma_cookie_t cookie;
struct v4l2_m2m_ctx *m2m_ctx;
struct dma_interleaved_template *xt;
};
/*
* mem2mem callbacks
*/
static int deinterlace_job_ready(void *priv)
{
struct deinterlace_ctx *ctx = priv;
struct deinterlace_dev *pcdev = ctx->dev;
if ((v4l2_m2m_num_src_bufs_ready(ctx->m2m_ctx) > 0)
&& (v4l2_m2m_num_dst_bufs_ready(ctx->m2m_ctx) > 0)
&& (atomic_read(&ctx->dev->busy) == 0)) {
dprintk(pcdev, "Task ready\n");
return 1;
}
dprintk(pcdev, "Task not ready to run\n");
return 0;
}
static void deinterlace_job_abort(void *priv)
{
struct deinterlace_ctx *ctx = priv;
struct deinterlace_dev *pcdev = ctx->dev;
ctx->aborting = 1;
dprintk(pcdev, "Aborting task\n");
v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx);
}
static void deinterlace_lock(void *priv)
{
struct deinterlace_ctx *ctx = priv;
struct deinterlace_dev *pcdev = ctx->dev;
mutex_lock(&pcdev->dev_mutex);
}
static void deinterlace_unlock(void *priv)
{
struct deinterlace_ctx *ctx = priv;
struct deinterlace_dev *pcdev = ctx->dev;
mutex_unlock(&pcdev->dev_mutex);
}
static void dma_callback(void *data)
{
struct deinterlace_ctx *curr_ctx = data;
struct deinterlace_dev *pcdev = curr_ctx->dev;
struct vb2_buffer *src_vb, *dst_vb;
atomic_set(&pcdev->busy, 0);
src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx);
dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx);
src_vb->v4l2_buf.timestamp = dst_vb->v4l2_buf.timestamp;
src_vb->v4l2_buf.timecode = dst_vb->v4l2_buf.timecode;
v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE);
v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE);
v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx);
dprintk(pcdev, "dma transfers completed.\n");
}
static void deinterlace_issue_dma(struct deinterlace_ctx *ctx, int op,
int do_callback)
{
struct deinterlace_q_data *s_q_data;
struct vb2_buffer *src_buf, *dst_buf;
struct deinterlace_dev *pcdev = ctx->dev;
struct dma_chan *chan = pcdev->dma_chan;
struct dma_device *dmadev = chan->device;
struct dma_async_tx_descriptor *tx;
unsigned int s_width, s_height;
unsigned int s_size;
dma_addr_t p_in, p_out;
enum dma_ctrl_flags flags;
src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx);
s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
s_width = s_q_data->width;
s_height = s_q_data->height;
s_size = s_width * s_height;
p_in = (dma_addr_t)vb2_dma_contig_plane_dma_addr(src_buf, 0);
p_out = (dma_addr_t)vb2_dma_contig_plane_dma_addr(dst_buf, 0);
if (!p_in || !p_out) {
v4l2_err(&pcdev->v4l2_dev,
"Acquiring kernel pointers to buffers failed\n");
return;
}
switch (op) {
case YUV420_DMA_Y_ODD:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width;
ctx->xt->sgl[0].icg = s_width;
ctx->xt->src_start = p_in;
ctx->xt->dst_start = p_out;
break;
case YUV420_DMA_Y_EVEN:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width;
ctx->xt->sgl[0].icg = s_width;
ctx->xt->src_start = p_in + s_size / 2;
ctx->xt->dst_start = p_out + s_width;
break;
case YUV420_DMA_U_ODD:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + s_size;
ctx->xt->dst_start = p_out + s_size;
break;
case YUV420_DMA_U_EVEN:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + (9 * s_size) / 8;
ctx->xt->dst_start = p_out + s_size + s_width / 2;
break;
case YUV420_DMA_V_ODD:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + (5 * s_size) / 4;
ctx->xt->dst_start = p_out + (5 * s_size) / 4;
break;
case YUV420_DMA_V_EVEN:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + (11 * s_size) / 8;
ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
break;
case YUV420_DMA_Y_ODD_DOUBLING:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width;
ctx->xt->sgl[0].icg = s_width;
ctx->xt->src_start = p_in;
ctx->xt->dst_start = p_out + s_width;
break;
case YUV420_DMA_U_ODD_DOUBLING:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + s_size;
ctx->xt->dst_start = p_out + s_size + s_width / 2;
break;
case YUV420_DMA_V_ODD_DOUBLING:
ctx->xt->numf = s_height / 4;
ctx->xt->sgl[0].size = s_width / 2;
ctx->xt->sgl[0].icg = s_width / 2;
ctx->xt->src_start = p_in + (5 * s_size) / 4;
ctx->xt->dst_start = p_out + (5 * s_size) / 4 + s_width / 2;
break;
case YUYV_DMA_ODD:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width * 2;
ctx->xt->sgl[0].icg = s_width * 2;
ctx->xt->src_start = p_in;
ctx->xt->dst_start = p_out;
break;
case YUYV_DMA_EVEN:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width * 2;
ctx->xt->sgl[0].icg = s_width * 2;
ctx->xt->src_start = p_in + s_size;
ctx->xt->dst_start = p_out + s_width * 2;
break;
case YUYV_DMA_EVEN_DOUBLING:
default:
ctx->xt->numf = s_height / 2;
ctx->xt->sgl[0].size = s_width * 2;
ctx->xt->sgl[0].icg = s_width * 2;
ctx->xt->src_start = p_in;
ctx->xt->dst_start = p_out + s_width * 2;
break;
}
/* Common parameters for al transfers */
ctx->xt->frame_size = 1;
ctx->xt->dir = DMA_MEM_TO_MEM;
ctx->xt->src_sgl = false;
ctx->xt->dst_sgl = true;
flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
tx = dmadev->device_prep_interleaved_dma(chan, ctx->xt, flags);
if (tx == NULL) {
v4l2_warn(&pcdev->v4l2_dev, "DMA interleaved prep error\n");
return;
}
if (do_callback) {
tx->callback = dma_callback;
tx->callback_param = ctx;
}
ctx->cookie = dmaengine_submit(tx);
if (dma_submit_error(ctx->cookie)) {
v4l2_warn(&pcdev->v4l2_dev,
"DMA submit error %d with src=0x%x dst=0x%x len=0x%x\n",
ctx->cookie, (unsigned)p_in, (unsigned)p_out,
s_size * 3/2);
return;
}
dma_async_issue_pending(chan);
}
static void deinterlace_device_run(void *priv)
{
struct deinterlace_ctx *ctx = priv;
struct deinterlace_q_data *dst_q_data;
atomic_set(&ctx->dev->busy, 1);
dprintk(ctx->dev, "%s: DMA try issue.\n", __func__);
dst_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
/*
* 4 possible field conversions are possible at the moment:
* V4L2_FIELD_SEQ_TB --> V4L2_FIELD_INTERLACED_TB:
* two separate fields in the same input buffer are interlaced
* in the output buffer using weaving. Top field comes first.
* V4L2_FIELD_SEQ_TB --> V4L2_FIELD_NONE:
* top field from the input buffer is copied to the output buffer
* using line doubling. Bottom field from the input buffer is discarded.
* V4L2_FIELD_SEQ_BT --> V4L2_FIELD_INTERLACED_BT:
* two separate fields in the same input buffer are interlaced
* in the output buffer using weaving. Bottom field comes first.
* V4L2_FIELD_SEQ_BT --> V4L2_FIELD_NONE:
* bottom field from the input buffer is copied to the output buffer
* using line doubling. Top field from the input buffer is discarded.
*/
switch (dst_q_data->fmt->fourcc) {
case V4L2_PIX_FMT_YUV420:
switch (dst_q_data->field) {
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
dprintk(ctx->dev, "%s: yuv420 interlaced tb.\n",
__func__);
deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_Y_EVEN, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_U_EVEN, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_V_EVEN, 1);
break;
case V4L2_FIELD_NONE:
default:
dprintk(ctx->dev, "%s: yuv420 interlaced line doubling.\n",
__func__);
deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_Y_ODD_DOUBLING, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_U_ODD_DOUBLING, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD, 0);
deinterlace_issue_dma(ctx, YUV420_DMA_V_ODD_DOUBLING, 1);
break;
}
break;
case V4L2_PIX_FMT_YUYV:
default:
switch (dst_q_data->field) {
case V4L2_FIELD_INTERLACED_TB:
case V4L2_FIELD_INTERLACED_BT:
dprintk(ctx->dev, "%s: yuyv interlaced_tb.\n",
__func__);
deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
deinterlace_issue_dma(ctx, YUYV_DMA_EVEN, 1);
break;
case V4L2_FIELD_NONE:
default:
dprintk(ctx->dev, "%s: yuyv interlaced line doubling.\n",
__func__);
deinterlace_issue_dma(ctx, YUYV_DMA_ODD, 0);
deinterlace_issue_dma(ctx, YUYV_DMA_EVEN_DOUBLING, 1);
break;
}
break;
}
dprintk(ctx->dev, "%s: DMA issue done.\n", __func__);
}
/*
* video ioctls
*/
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
strlcpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver));
strlcpy(cap->card, MEM2MEM_NAME, sizeof(cap->card));
strlcpy(cap->bus_info, MEM2MEM_NAME, sizeof(cap->card));
/*
* This is only a mem-to-mem video device. The capture and output
* device capability flags are left only for backward compatibility
* and are scheduled for removal.
*/
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int enum_fmt(struct v4l2_fmtdesc *f, u32 type)
{
int i, num;
struct deinterlace_fmt *fmt;
num = 0;
for (i = 0; i < NUM_FORMATS; ++i) {
if (formats[i].types & type) {
/* index-th format of type type found ? */
if (num == f->index)
break;
/* Correct type but haven't reached our index yet,
* just increment per-type index */
++num;
}
}
if (i < NUM_FORMATS) {
/* Format found */
fmt = &formats[i];
strlcpy(f->description, fmt->name, sizeof(f->description));
f->pixelformat = fmt->fourcc;
return 0;
}
/* Format not found */
return -EINVAL;
}
static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return enum_fmt(f, MEM2MEM_CAPTURE);
}
static int vidioc_enum_fmt_vid_out(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
return enum_fmt(f, MEM2MEM_OUTPUT);
}
static int vidioc_g_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
{
struct vb2_queue *vq;
struct deinterlace_q_data *q_data;
vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
if (!vq)
return -EINVAL;
q_data = get_q_data(f->type);
f->fmt.pix.width = q_data->width;
f->fmt.pix.height = q_data->height;
f->fmt.pix.field = q_data->field;
f->fmt.pix.pixelformat = q_data->fmt->fourcc;
switch (q_data->fmt->fourcc) {
case V4L2_PIX_FMT_YUV420:
f->fmt.pix.bytesperline = q_data->width * 3 / 2;
break;
case V4L2_PIX_FMT_YUYV:
default:
f->fmt.pix.bytesperline = q_data->width * 2;
}
f->fmt.pix.sizeimage = q_data->sizeimage;
f->fmt.pix.colorspace = ctx->colorspace;
return 0;
}
static int vidioc_g_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
return vidioc_g_fmt(priv, f);
}
static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
return vidioc_g_fmt(priv, f);
}
static int vidioc_try_fmt(struct v4l2_format *f, struct deinterlace_fmt *fmt)
{
switch (f->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_YUV420:
f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
break;
case V4L2_PIX_FMT_YUYV:
default:
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
}
f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
return 0;
}
static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
struct deinterlace_fmt *fmt;
struct deinterlace_ctx *ctx = priv;
fmt = find_format(f);
if (!fmt || !(fmt->types & MEM2MEM_CAPTURE))
f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
f->fmt.pix.colorspace = ctx->colorspace;
if (f->fmt.pix.field != V4L2_FIELD_INTERLACED_TB &&
f->fmt.pix.field != V4L2_FIELD_INTERLACED_BT &&
f->fmt.pix.field != V4L2_FIELD_NONE)
f->fmt.pix.field = V4L2_FIELD_INTERLACED_TB;
return vidioc_try_fmt(f, fmt);
}
static int vidioc_try_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct deinterlace_fmt *fmt;
fmt = find_format(f);
if (!fmt || !(fmt->types & MEM2MEM_OUTPUT))
f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUV420;
if (!f->fmt.pix.colorspace)
f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
if (f->fmt.pix.field != V4L2_FIELD_SEQ_TB &&
f->fmt.pix.field != V4L2_FIELD_SEQ_BT)
f->fmt.pix.field = V4L2_FIELD_SEQ_TB;
return vidioc_try_fmt(f, fmt);
}
static int vidioc_s_fmt(struct deinterlace_ctx *ctx, struct v4l2_format *f)
{
struct deinterlace_q_data *q_data;
struct vb2_queue *vq;
vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type);
if (!vq)
return -EINVAL;
q_data = get_q_data(f->type);
if (!q_data)
return -EINVAL;
if (vb2_is_busy(vq)) {
v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__);
return -EBUSY;
}
q_data->fmt = find_format(f);
if (!q_data->fmt) {
v4l2_err(&ctx->dev->v4l2_dev,
"Couldn't set format type %d, wxh: %dx%d. fmt: %d, field: %d\n",
f->type, f->fmt.pix.width, f->fmt.pix.height,
f->fmt.pix.pixelformat, f->fmt.pix.field);
return -EINVAL;
}
q_data->width = f->fmt.pix.width;
q_data->height = f->fmt.pix.height;
q_data->field = f->fmt.pix.field;
switch (f->fmt.pix.pixelformat) {
case V4L2_PIX_FMT_YUV420:
f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2;
q_data->sizeimage = (q_data->width * q_data->height * 3) / 2;
break;
case V4L2_PIX_FMT_YUYV:
default:
f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
q_data->sizeimage = q_data->width * q_data->height * 2;
}
dprintk(ctx->dev,
"Setting format for type %d, wxh: %dx%d, fmt: %d, field: %d\n",
f->type, q_data->width, q_data->height, q_data->fmt->fourcc,
q_data->field);
return 0;
}
static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
int ret;
ret = vidioc_try_fmt_vid_cap(file, priv, f);
if (ret)
return ret;
return vidioc_s_fmt(priv, f);
}
static int vidioc_s_fmt_vid_out(struct file *file, void *priv,
struct v4l2_format *f)
{
struct deinterlace_ctx *ctx = priv;
int ret;
ret = vidioc_try_fmt_vid_out(file, priv, f);
if (ret)
return ret;
ret = vidioc_s_fmt(priv, f);
if (!ret)
ctx->colorspace = f->fmt.pix.colorspace;
return ret;
}
static int vidioc_reqbufs(struct file *file, void *priv,
struct v4l2_requestbuffers *reqbufs)
{
struct deinterlace_ctx *ctx = priv;
return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs);
}
static int vidioc_querybuf(struct file *file, void *priv,
struct v4l2_buffer *buf)
{
struct deinterlace_ctx *ctx = priv;
return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct deinterlace_ctx *ctx = priv;
return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
{
struct deinterlace_ctx *ctx = priv;
return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
}
static int vidioc_streamon(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct deinterlace_q_data *s_q_data, *d_q_data;
struct deinterlace_ctx *ctx = priv;
s_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_OUTPUT);
d_q_data = get_q_data(V4L2_BUF_TYPE_VIDEO_CAPTURE);
/* Check that src and dst queues have the same pix format */
if (s_q_data->fmt->fourcc != d_q_data->fmt->fourcc) {
v4l2_err(&ctx->dev->v4l2_dev,
"src and dst formats don't match.\n");
return -EINVAL;
}
/* Check that input and output deinterlacing types are compatible */
switch (s_q_data->field) {
case V4L2_FIELD_SEQ_BT:
if (d_q_data->field != V4L2_FIELD_NONE &&
d_q_data->field != V4L2_FIELD_INTERLACED_BT) {
v4l2_err(&ctx->dev->v4l2_dev,
"src and dst field conversion [(%d)->(%d)] not supported.\n",
s_q_data->field, d_q_data->field);
return -EINVAL;
}
break;
case V4L2_FIELD_SEQ_TB:
if (d_q_data->field != V4L2_FIELD_NONE &&
d_q_data->field != V4L2_FIELD_INTERLACED_TB) {
v4l2_err(&ctx->dev->v4l2_dev,
"src and dst field conversion [(%d)->(%d)] not supported.\n",
s_q_data->field, d_q_data->field);
return -EINVAL;
}
break;
default:
return -EINVAL;
}
return v4l2_m2m_streamon(file, ctx->m2m_ctx, type);
}
static int vidioc_streamoff(struct file *file, void *priv,
enum v4l2_buf_type type)
{
struct deinterlace_ctx *ctx = priv;
return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type);
}
static const struct v4l2_ioctl_ops deinterlace_ioctl_ops = {
.vidioc_querycap = vidioc_querycap,
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
.vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out,
.vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out,
.vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out,
.vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out,
.vidioc_reqbufs = vidioc_reqbufs,
.vidioc_querybuf = vidioc_querybuf,
.vidioc_qbuf = vidioc_qbuf,
.vidioc_dqbuf = vidioc_dqbuf,
.vidioc_streamon = vidioc_streamon,
.vidioc_streamoff = vidioc_streamoff,
};
/*
* Queue operations
*/
struct vb2_dc_conf {
struct device *dev;
};
static int deinterlace_queue_setup(struct vb2_queue *vq,
const struct v4l2_format *fmt,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], void *alloc_ctxs[])
{
struct deinterlace_ctx *ctx = vb2_get_drv_priv(vq);
struct deinterlace_q_data *q_data;
unsigned int size, count = *nbuffers;
q_data = get_q_data(vq->type);
switch (q_data->fmt->fourcc) {
case V4L2_PIX_FMT_YUV420:
size = q_data->width * q_data->height * 3 / 2;
break;
case V4L2_PIX_FMT_YUYV:
default:
size = q_data->width * q_data->height * 2;
}
*nplanes = 1;
*nbuffers = count;
sizes[0] = size;
alloc_ctxs[0] = ctx->dev->alloc_ctx;
dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size);
return 0;
}
static int deinterlace_buf_prepare(struct vb2_buffer *vb)
{
struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct deinterlace_q_data *q_data;
dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type);
q_data = get_q_data(vb->vb2_queue->type);
if (vb2_plane_size(vb, 0) < q_data->sizeimage) {
dprintk(ctx->dev, "%s data will not fit into plane (%lu < %lu)\n",
__func__, vb2_plane_size(vb, 0), (long)q_data->sizeimage);
return -EINVAL;
}
vb2_set_plane_payload(vb, 0, q_data->sizeimage);
return 0;
}
static void deinterlace_buf_queue(struct vb2_buffer *vb)
{
struct deinterlace_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
v4l2_m2m_buf_queue(ctx->m2m_ctx, vb);
}
static struct vb2_ops deinterlace_qops = {
.queue_setup = deinterlace_queue_setup,
.buf_prepare = deinterlace_buf_prepare,
.buf_queue = deinterlace_buf_queue,
};
static int queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
struct deinterlace_ctx *ctx = priv;
int ret;
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
src_vq->drv_priv = ctx;
src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
src_vq->ops = &deinterlace_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
src_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
q_data[V4L2_M2M_SRC].fmt = &formats[0];
q_data[V4L2_M2M_SRC].width = 640;
q_data[V4L2_M2M_SRC].height = 480;
q_data[V4L2_M2M_SRC].sizeimage = (640 * 480 * 3) / 2;
q_data[V4L2_M2M_SRC].field = V4L2_FIELD_SEQ_TB;
ret = vb2_queue_init(src_vq);
if (ret)
return ret;
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
dst_vq->drv_priv = ctx;
dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
dst_vq->ops = &deinterlace_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
dst_vq->timestamp_type = V4L2_BUF_FLAG_TIMESTAMP_COPY;
q_data[V4L2_M2M_DST].fmt = &formats[0];
q_data[V4L2_M2M_DST].width = 640;
q_data[V4L2_M2M_DST].height = 480;
q_data[V4L2_M2M_DST].sizeimage = (640 * 480 * 3) / 2;
q_data[V4L2_M2M_SRC].field = V4L2_FIELD_INTERLACED_TB;
return vb2_queue_init(dst_vq);
}
/*
* File operations
*/
static int deinterlace_open(struct file *file)
{
struct deinterlace_dev *pcdev = video_drvdata(file);
struct deinterlace_ctx *ctx = NULL;
ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
if (!ctx)
return -ENOMEM;
file->private_data = ctx;
ctx->dev = pcdev;
ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init);
if (IS_ERR(ctx->m2m_ctx)) {
int ret = PTR_ERR(ctx->m2m_ctx);
kfree(ctx);
return ret;
}
ctx->xt = kzalloc(sizeof(struct dma_interleaved_template) +
sizeof(struct data_chunk), GFP_KERNEL);
if (!ctx->xt) {
kfree(ctx);
return -ENOMEM;
}
ctx->colorspace = V4L2_COLORSPACE_REC709;
dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx);
return 0;
}
static int deinterlace_release(struct file *file)
{
struct deinterlace_dev *pcdev = video_drvdata(file);
struct deinterlace_ctx *ctx = file->private_data;
dprintk(pcdev, "Releasing instance %p\n", ctx);
v4l2_m2m_ctx_release(ctx->m2m_ctx);
kfree(ctx->xt);
kfree(ctx);
return 0;
}
static unsigned int deinterlace_poll(struct file *file,
struct poll_table_struct *wait)
{
struct deinterlace_ctx *ctx = file->private_data;
int ret;
deinterlace_lock(ctx);
ret = v4l2_m2m_poll(file, ctx->m2m_ctx, wait);
deinterlace_unlock(ctx);
return ret;
}
static int deinterlace_mmap(struct file *file, struct vm_area_struct *vma)
{
struct deinterlace_ctx *ctx = file->private_data;
return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma);
}
static const struct v4l2_file_operations deinterlace_fops = {
.owner = THIS_MODULE,
.open = deinterlace_open,
.release = deinterlace_release,
.poll = deinterlace_poll,
.unlocked_ioctl = video_ioctl2,
.mmap = deinterlace_mmap,
};
static struct video_device deinterlace_videodev = {
.name = MEM2MEM_NAME,
.fops = &deinterlace_fops,
.ioctl_ops = &deinterlace_ioctl_ops,
.minor = -1,
.release = video_device_release,
.vfl_dir = VFL_DIR_M2M,
};
static struct v4l2_m2m_ops m2m_ops = {
.device_run = deinterlace_device_run,
.job_ready = deinterlace_job_ready,
.job_abort = deinterlace_job_abort,
.lock = deinterlace_lock,
.unlock = deinterlace_unlock,
};
static int deinterlace_probe(struct platform_device *pdev)
{
struct deinterlace_dev *pcdev;
struct video_device *vfd;
dma_cap_mask_t mask;
int ret = 0;
pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL);
if (!pcdev)
return -ENOMEM;
spin_lock_init(&pcdev->irqlock);
dma_cap_zero(mask);
dma_cap_set(DMA_INTERLEAVE, mask);
pcdev->dma_chan = dma_request_channel(mask, NULL, pcdev);
if (!pcdev->dma_chan)
goto free_dev;
if (!dma_has_cap(DMA_INTERLEAVE, pcdev->dma_chan->device->cap_mask)) {
v4l2_err(&pcdev->v4l2_dev, "DMA does not support INTERLEAVE\n");
goto rel_dma;
}
ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev);
if (ret)
goto rel_dma;
atomic_set(&pcdev->busy, 0);
mutex_init(&pcdev->dev_mutex);
vfd = video_device_alloc();
if (!vfd) {
v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n");
ret = -ENOMEM;
goto unreg_dev;
}
*vfd = deinterlace_videodev;
vfd->lock = &pcdev->dev_mutex;
vfd->v4l2_dev = &pcdev->v4l2_dev;
ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0);
if (ret) {
v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n");
goto rel_vdev;
}
video_set_drvdata(vfd, pcdev);
snprintf(vfd->name, sizeof(vfd->name), "%s", deinterlace_videodev.name);
pcdev->vfd = vfd;
v4l2_info(&pcdev->v4l2_dev, MEM2MEM_TEST_MODULE_NAME
" Device registered as /dev/video%d\n", vfd->num);
platform_set_drvdata(pdev, pcdev);
pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
if (IS_ERR(pcdev->alloc_ctx)) {
v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n");
ret = PTR_ERR(pcdev->alloc_ctx);
goto err_ctx;
}
pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops);
if (IS_ERR(pcdev->m2m_dev)) {
v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n");
ret = PTR_ERR(pcdev->m2m_dev);
goto err_m2m;
}
return 0;
v4l2_m2m_release(pcdev->m2m_dev);
err_m2m:
video_unregister_device(pcdev->vfd);
err_ctx:
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
rel_vdev:
video_device_release(vfd);
unreg_dev:
v4l2_device_unregister(&pcdev->v4l2_dev);
rel_dma:
dma_release_channel(pcdev->dma_chan);
free_dev:
kfree(pcdev);
return ret;
}
static int deinterlace_remove(struct platform_device *pdev)
{
struct deinterlace_dev *pcdev = platform_get_drvdata(pdev);
v4l2_info(&pcdev->v4l2_dev, "Removing " MEM2MEM_TEST_MODULE_NAME);
v4l2_m2m_release(pcdev->m2m_dev);
video_unregister_device(pcdev->vfd);
v4l2_device_unregister(&pcdev->v4l2_dev);
vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
dma_release_channel(pcdev->dma_chan);
kfree(pcdev);
return 0;
}
static struct platform_driver deinterlace_pdrv = {
.probe = deinterlace_probe,
.remove = deinterlace_remove,
.driver = {
.name = MEM2MEM_NAME,
.owner = THIS_MODULE,
},
};
module_platform_driver(deinterlace_pdrv);